Drawing-rolls for spinning-machines



(No Model.)

F. H. RICHARDS. DRAWING ROLLSFOR SPINNING MACHINES. No. 474,030;

Patented May 3, 1892.

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UNlTED STATES arnrwr union.

FRANCIS I-I. RICHARDS, OF HARTFORD, CONNECTICUT.

DRAWING-ROLLS FOR SPINNING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 474,030, dated May 3,1892.

Application filed July 8, 1891. Serial No. 398,761. (No model.)

T on whom it may concern:

Be it known that I, FRANCIS I-I. RICHARDS, a citizen of the UnitedStates, residing at Hartford, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inDrawing-Rolls for Spinning-Macl1ines, of which the following is aspecification.

This invention relates to rolls used in drawing-heads for reducingslivers of fiber preparatory to the twisting and spinning of the same,the object being to provide improved drawing-rolls which shall be morepositive and reliable in their operation than the rolls ordinarily usedfor this purpose.

In the drawings forming a part of this specification, Figure 1 is a planview of a pair of drawing-rolls embodying my present improvements. Fig.2 is a side elevation of the drawing-rolls. Fig. 3 is an end elevationof the same drawn in projection with Fig. 2. Fig. 4 is a sectional endelevation of the rolls, the view being taken on line a a, Fig. 2, andshowing the construction of the rolls more in detail.

Similar characters designate like parts in all the figures.

The lower drawing-roll B is fixed upon a driving-shaft 2, that iscarried by bearings formed in the two uprights 3 and 5, respectively, ofthe frame F. Said lower roll is longitudinally grooved after theordinary manner of constructing drawing-rolls to form the series ofV-shaped ribs 6, which should be slightly rounded at their outer edgesto prevent any cutting or unnecessary abrasion of the fiber. The lowerroll, which I denominate the V-roll, is positively rotated through itsshaft 2 by the usual means-as, for instance, a wheel or gear (notshown)fixed upon the end 8 of said shaft. The top roll 0 is carried byan upper shaft 4, which may be supported in the removable bearings 10and 12, respectively, which bearings are set in suitable notches orrecesses formed, substantially as shown, in the upper ends of theaforesaid uprights 3 and 5 and retained therein by the ordinarysegmentally-flanged holding-screws 7 and 9, respectively. On turning thehold ing-screws to loosen the same and bring the fiat sides 7 and 9 ofthe flanges thereof ad jace-nt to the removable bearings 10 .and 12these bearings may be lifted out of their seats in a well-known manner.

The top roll, according to my improvements, is provided with a series ofspringribs, which are inserted in slots formed in the outer surface ofthe roll-body C, as will be understood from Fig. 4. The outer edges ofthe spring-blades or ribs 14 are shown curved backwardly to form ovaledfaces fol-properly bearing against the rearward sides of the aforesaidV-ribs 6 of the lower roll. It is to be understood that the inclinationof the sides of the ribs 6 relative to a radial line from said ribs tothe axis of roll B may be varied for the purpose of modifying the actionof the aforesaid spring-ribs against said inclined sides, or one sideonly of one of said ribs may in some cases be inclined, as set forth.

The upper roll and its shaft are or may be driven from the lower roll bymeans of a pair of spur-gears 13 and 15, fixed on said shafts 2 and 4,respectively. The position, circumferentially, of the shafts of saidrolls and gears should be such as to bring the spring blades or ribs 14into proper working position relatively to the \l-ribs of the lowerroll. As a means for regulating this relation of the respective ribs, Imake the gears 13 and 15 to have one tooth more or less than thecorresponding roll has ribs relatively to the ribs of the rolls. Bymeans of this construction of the gears to have a variant number ofteeth the relative working positions of the respective ribs may bemodified by slipping one of the gears one tooth forward or back, as thecase may require, thus adjusting the rolls by a fractional part of thedistance between two successive ribs corresponding to the number ofteeth in the gear. By this means the work ing distance of thespring-blades may be brought just close enough to the V-ribs to properlygrasp the sliver in any particular case. The blades 14, being somewhatelastic, overcome the slight irregularity of construction unavoidable inthe making of the V-rolls and also hold the sliver with a yieldingpressure, so as to simultaneously grasp it against two or more of theV-ribs with substantially equal force. Said blades being elastic, as setforth, also yield at one end more than at the other whenever the mass ofthe sliver is thicker at one side than toward the other side thereof,and the blade also when properly constructed should be slightly elasticlongitudinally, so as to better conform itself to the cross-sectionalform of the sliver, and thus increase the holding-power, whilemaintaining the least practicable pressure thereon.

In my improved drawing-rolls the pressure upon the sliver isself-regulating, since when the sliver increases in size it forces backthe spring-blades from the corresponding faces of the V-ribs, and bythus increasing the tension of the spring increases the pressure on thesliver, thus securing the required increase of drawing-power.

In the drawings rolls B and O are shown mounted upon shafts 2 and 4,respectively, which shafts constitute journals for revolubly supportingthe rolls in theirbearings, and may in some cases, if so preferred, beformed integral with the rolls.

Having thus described my invention, I claim- 1. A pair of drawing-rollsfor fibrous materials, consisting of one ribbed roll and a roll providedwith springblades coacting with the ribs of the other roll,substantially as described.

2. A pair of drawing-rolls for fibrous materials, consisting of oneV-ribbed roll and a roll provided with spring-blades, coacting with theribs of the other roll and having the edges of the springs backwardlycurved, substantially as described.

3., The combination, with supporting framework, of the ribbed roll andthe spring-roll revolnbly supported in the frame-work, and gearsactuating one said roll from the other and set to bring the blades ofthe spring-roll into working relation with one side of the ribs of theopposite roll, substantially as described.

4. The combination, with supporting framework, of the ribbed roll andthe spring-roll revolnbly supported in the frame-work, and gearsactuating one said roll from the other and set to bring the blades ofthe spring-roll into engagement with one side of the ribs of theopposite roll and having their teeth of a variant number relatively tothe ribs of the rolls, whereby the coaction of the ribs and blades maybe adjusted, substantially as described.

5. The combination, with the frame-work FRANCIS H. RICHARDS. WVitnesses:

HENRY L. REOKARD, H. MALLNER.

